87816794111 has 2 divisors, whose sum is σ = 87816794112. Its totient is φ = 87816794110.

The previous prime is 87816794041. The next prime is 87816794113. The reversal of 87816794111 is 11149761878.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87816794111 is a prime.

It is a Sophie Germain prime.

Together with 87816794113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87816794113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43908397055 + 43908397056.

It is an arithmetic number, because the mean of its divisors is an integer number (43908397056).

Almost surely, 2^87816794111 is an apocalyptic number.

87816794111 is a deficient number, since it is larger than the sum of its proper divisors (1).

87816794111 is an equidigital number, since it uses as much as digits as its factorization.

87816794111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 53.

The spelling of 87816794111 in words is "eighty-seven billion, eight hundred sixteen million, seven hundred ninety-four thousand, one hundred eleven".